:root {
  --paper: #f5f3eb;
  --ink: #262c25;
  --muted: #676c60;
  --line: #dcded1;
  --lime: #d7ef8a;
  --error: #9c3329;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; }
.page { max-width: 1280px; margin: 0 auto; padding: 0 64px; }
.masthead { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; gap: 12px; align-items: center; font-size: 24px; font-weight: 600; letter-spacing: -1px; text-decoration: none; color: var(--ink); }
.brand-mark { display: grid; place-items: center; width: 35px; height: 35px; background: var(--ink); color: var(--lime); border-radius: 9px; font-family: Georgia, serif; font-style: italic; font-size: 29px; padding-bottom: 3px; }
.edition, .eyebrow, .card-number { font-size: 11px; letter-spacing: 1.8px; }
.edition { color: var(--muted); letter-spacing: 1px; }
main { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .9fr); gap: 70px; align-items: center; padding: 82px 0 90px; min-height: calc(100svh - 185px); }
.intro { padding-bottom: 20px; animation: appear .65s ease both; }
.eyebrow { display: flex; align-items: center; gap: 9px; font-weight: 600; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #708d42; box-shadow: 0 0 0 4px #e7ebd9; }
h1 { font-family: "Songti SC", "STSong", Georgia, serif; font-weight: 500; font-size: clamp(38px, 4.5vw, 60px); line-height: 1.5; letter-spacing: -2px; margin: 30px 0 24px; }
.highlight { position: relative; z-index: 0; white-space: nowrap; }
.highlight::after { content: ""; position: absolute; left: -3px; right: 0; bottom: 1px; height: 18px; background: var(--lime); z-index: -1; transform: rotate(-2deg); }
.lead { color: var(--muted); font-size: 16px; line-height: 2; }
.annotation { display: flex; align-items: center; gap: 12px; margin-top: 44px; color: var(--muted); font-size: 12px; }
.annotation-line { width: 28px; height: 1px; background: #9ba28a; transform: rotate(-30deg); }
.signup { background: #fffef8; border: 1px solid var(--line); border-radius: 4px; padding: 34px; box-shadow: 9px 10px 0 #e9eadf; animation: appear .65s .1s ease both; }
.card-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card-number { color: var(--muted); letter-spacing: 0; }
h2 { font-family: "Songti SC", "STSong", Georgia, serif; font-weight: 500; font-size: 31px; line-height: 1.5; letter-spacing: -1px; margin: 27px 0 10px; }
.card-copy { color: var(--muted); font-size: 13px; margin: 0 0 30px; line-height: 1.7; }
label { display: block; font-size: 12px; font-weight: 600; margin-bottom: 10px; }
input { width: 100%; min-height: 52px; border: 1px solid #c6ccbd; border-radius: 3px; background: transparent; padding: 13px 14px; font: inherit; font-size: 16px; color: var(--ink); transition: border-color .15s; }
input::placeholder { color: #8a907f; }
input:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid #789444; outline-offset: 4px; }
input[aria-invalid="true"] { border-color: var(--error); }
.hint { color: var(--muted); font-size: 11px; margin: 9px 0 20px; }
button { width: 100%; min-height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 13px 17px; border: 1px solid var(--ink); border-radius: 3px; background: var(--ink); color: #fffef8; font: inherit; font-size: 14px; cursor: pointer; transition: background .15s, transform .15s; }
button:hover { background: #424c37; transform: translateY(-1px); }
button:disabled { cursor: wait; opacity: .65; transform: none; }
.feedback { padding: 13px 14px; margin-top: 16px; background: #eef4dd; border-left: 3px solid #6d873d; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.feedback p { margin: 0; }
.feedback[data-state="error"] { background: #fff0e9; border-color: var(--error); color: var(--error); }
.feedback .feedback-detail { margin-top: 5px; font-size: 11px; color: var(--muted); }
.card-footer { display: flex; gap: 8px; align-items: baseline; padding-top: 23px; margin-top: 27px; border-top: 1px solid var(--line); font-size: 10px; color: var(--muted); line-height: 1.7; }
.card-footer > span:first-child { color: #768643; font-size: 17px; }
.no-script { font-size: 12px; color: var(--error); }
.footer { display: flex; justify-content: space-between; gap: 16px; padding: 26px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .8px; }
[hidden] { display: none !important; }
@keyframes appear { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 900px) {
  .page { padding: 0 32px; }
  main { gap: 35px; padding: 60px 0 70px; }
  .signup { padding: 26px; }
}
@media (max-width: 680px) {
  .page { padding: 0 24px; }
  .masthead { min-height: 86px; }
  .brand { font-size: 22px; }
  .edition { max-width: 100px; text-align: right; font-size: 10px; line-height: 1.8; }
  main { display: block; padding: 40px 0 52px; }
  .intro { padding-bottom: 36px; }
  h1 { margin-top: 22px; font-size: clamp(34px, 8.3vw, 48px); }
  .annotation { margin-top: 24px; }
  .signup { padding: 27px 24px; }
  .footer { flex-direction: column; font-size: 9px; line-height: 1.8; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}